Web: ASP.NET AJAX

  In this blog I will try to summarize the most common reasons for getting the famous 'Sys is undefined' error when running an Ajax enabled web site or application (there are almost one million results on Google for that phrase). Where does it come from? In every Ajax web page’s source you will see a code like this: <script type="text/javascript"> //<![CDATA[ Sys.WebForms.PageRequestManager._initialize('ScriptManager1', document.getElementById('form1')); Sys.WebForms.PageRequestManager.getInstance()._updateControls([], [], [],...

Howdy folks! It has been a while since I last blogged. To compensate for it, however, I am bringing some exciting news to our loyal RadChart users. While not blogging I have been busy working with two of the smartest people in our company to bring you some really dramatic performance improvements to RadChart. I have to admit that in the past performance was not paramount for our product. We focused on features, appearance, ease of use to produce one of the most versatile charting components on the market. Today, however, marks the beginning of another direction. Starting with the Q1 2010 release,...

If you are interested in getting a bunch of helpful performance tips concerning RadGrid for ASP.NET AJAX, join Carl Bergenhem's webinar tomorrow at 11.00AM EST: https://www1.gotomeeting.com/register/479189401

Beside of all the other new neat features the RadListView for ASP.NET AJAX will have with the Q1 2010 release, it will also incorporate built-in filtering capabilities. The control will expose a fluent-like server-side API which can be used to specify filter expression in the following manner:   listView.FilterExpressions.BuildExpression() .GreaterThanOrEqualTo("OrderDate", DateTime.Parse("7/5/1996")) .And() .Group(group => group.EqualTo("ShipCountry", "Germany") .Or().EqualTo("ShipCountry", "France") ...

With the 2010.Q1 release, RadListView for ASP.NET AJAX is getting a fancy new client capability. You will be able to drag list view items around and drop them on other HTML elements, similar to RadGrid's row drag & drop functionality. Setting up RadListView to enable items drag & drop will be a piece of cake. Besides the usual AllowSomeFunctionality-type of property, all you will need to do will be: Use a CSS marker on an HTML element in the ItemTemplate / AlternatingItemTemplate to mark the bounds of a list view item. The content inside your HTML container marked by this CSS...